US Bridges

Csah 7 over Mill Creek

Fair

Olmsted County, Minnesota · 0.4 MI N of JCT TH 52 · Structure no. 55521

Built
1971
54 years old
Condition
Fair
inspected November 2023
Type
Channel Beam
Prestressed Concrete
Length
93 ft
3 main spans
Daily traffic
870
2018 count
Owner
County
County Highway Agency

About this bridge

Csah 7 over Mill Creek is a prestressed concrete channel beam carrying Csah 7 over Mill Creek in Olmsted County, Minnesota. It was built in 1971, so it is 54 years old, older than the Minnesota average of 38.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 870 vehicles a day, projected to reach 984 by 2038. The structure is 93 ft (28.4 m) long and 48 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCsah 7
CrossesMill Creek
Location0.4 MI N of JCT TH 52
RouteCounty Highway 7
CountyOlmsted County
StateMinnesota
Coordinates43.90383, -92.23823
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65.7 US tons
Inventory rating39.2 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length93 ft (28.4 m)
Longest span31 ft (9.4 m)
Deck width48 ft (14.5 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic870 (2018)
Projected traffic984 by 2038
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Csah 7 over Mill Creek built?

It was built in 1971, making it 54 years old in 2025.

What condition is Csah 7 over Mill Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in November 2023.

How much traffic does Csah 7 over Mill Creek carry?

About 870 vehicles per day (2018 count).

How long is Csah 7 over Mill Creek?

The structure is 93 ft (28.4 m) long with a longest span of 31 ft (9.4 m) and a deck 48 ft wide.

Who owns Csah 7 over Mill Creek?

It is owned by the County Highway Agency.